Injector for steam engines



C. A. NASH.

9d 2 9 1 .l 0 3 y .fm .1a e t n a DL NMO. NH G| NO El MC ...MM TJD SE L MH LIN Dum .NM Cm um WA OSA/@[5 ,4. /1//4 UNITED STATES CHARLES A. NASH, OF SEATTLE, WASHINGTON.

INJECTOR FOR STEAM ENGINES.

Application filed December 10, 1920.

T0 all 107mm 'it may concern.'

Be it known that I. @Hannes A. NASH, a citizen of the United States, residing at Seattle, in the county of King and State of IlVashington, have invented certain new and useful. Improvements in Injectors for Steam Engines, of which the following` is a specilication.

This invention relates to injectors for steam engines the primary object being to provide an injector having independent steam and water ways which converge so as to commingle the water and steam prior to its entry into the steam boiler.

Another object of the invention is to provide a valve automatically operable by ingress of steam to simultaneously open communication through the steam and water ways, the valve being automatically closed as soon as pressure of the steam is released. The above and other objects of this invention will be in part described and in part understood from the following description of the present preferred embodiment of the invention taken in connection with the accompanying drawings, wherein:

Fig. 1, is a longitudinal sectional view of an injector constructed in accordance with my invention showing the casting of the steam passageway in side elevation, and

2, is a top plan view thereof showing the cleaning cap removed, taken on the line 2-2 of Fig. 1.

In the drawings, a steam injector pipe 3 is provided which may be of a cylindrical or other desired configuration being pro` vided at one end with a steam inlet 4. A steam mount 5 is formed on the inner pe riphery of the pipe and extends upwardly into close proximity with the upper inner periphery of the pipe, leaving only a relatively narrow passage way 6 for the steam between the apex of the mount and the inner periphery of the pipe. A water inlet pipe 7 is detachably mounted in the pipe 3 and communicates with a water inlet opening 8, which extends through the mount 5 and terminates in a bore 9 which 'is formed in the pipe.

The bore 9 extends vertically through the pipe 3 and has slidably mounted therein a piston valve 10. The piston valve is preferably cylindrical in shape and is reduced midway its ends, as indicated at 11, to provide an annular chamber which is to communicate with the water opening 8 to per- Specicaton of Letters Patent.

Patented May 30, 1,922.

Serial No, 429,687.

mit the passage of water through said bore and into a water way 12, which latter tends longitudinally through the pipe 3. The 'upper end of the valve is normally held m engagement with a' valve seat. The valve seat in this instance consists of a horse shoe shaped casting 6 which issues from the wall of the bore 9. The constricted open end of the casting communicates with the passageway 6. AA clean-out eapl is threaded in the bore 9 above the casting 61. Removal of this cap permits the bore or valve to be cleaned or otherwise at tended to when desired.

The valve 10 is normally held in a closed position by a coil spring la, which is mount-ed in a chamber 15, the latter being detachably carried by the pipe 3 directly below the bore 9. This chamber comprises a collar, the lower end of which has a closure 16 mounted thereon, the said closure being provided with a screw threaded opening through which a threaded shank 17 extends. One end of the shank is provided with a cup 18, which is mounted within the chamber 15 and receives the lower end of the spring 14. The lower or outer end of the shank has a head 19 formed thereon by which the shank may be conveniently turned. Preferably the shank is engaged to the cup 18 by a swivel connection and is vheld from casual displacement in the closure 16 by means of a jam nut 20.

A wall 21 is formed in the pipe 3 and extends longitudinally through the latter so as to provide the water way 12 on one side and a steam way 22 on the opposite side. The said wall has its inception at the bore 9 and gradually tapers to a point 23, the latter extending into a tapering passageway 24, hereinafter referred to as the mixing chamber. Upon reference to Fig. 1 of the drawings, it will be noted that the passage-ways 12 and 22 are of an arcuate configuration and the outlet ends thereof are relatively narrow. Moreover, the passageway or mixing chamber 211 likewise tapers, whereby the water and steam will be thoroughly mingled and projected in a concentrated jet through the outlet end of the pipe 3 and into the boiler. It will be noted that the outlet end of the pipe 3 is provided with a semi-spherical recess 25 to provide a relatively large pocket adapted for the reception of steam, which may back from the boiler.

From the aboveit Will no doubt be obvious that steam in passing through the inlet 5 and passage 6 Will cause the valve 10 to be pressed downwardly against the resistance of the spring 14 thereby opening communication between the Water opening 8 and Water Way 12, as Well as between the steam inlet l and steam Way 22. The steam and Water are mingled in the chamber 2i and projectedl therefrom into the boiler in a manner above stated. the spring 14E may be adjusted through the medium of the shank 17 so as to lregulate the pressure of the steam. The device may be quickly assembled and applied to standard types ci' boilers and may also be quickly dismembered for repair purposes if necessary;

What is claimed is:

1. An injector for steam boilers including an injecting pipe having steam and VWater inlets, a valve in the path of said inlets, said valve being automatically opened by the influx of steam to permit simultaneous passage of steam and Water through said pipe.

2. An injector for steam boilers including The tension of naif/,ess

an injecting pipe having steam and Water inlets and independent steam and Water Ways through a portion of the length of Vthe pipe, said Ways converging to mingle the steam and Water prior to their entry into the boiler, and a valve mounted in said pipe to normally close communication through said Ways but being automatically opened by ingress of steam to open com munication through said Ways.

3. An injector for steam boilers including an injecting pipe having steam and Water inlets and steam and Water Ways for communication With said inlets, a .valve normally closing communication'between said inlets and Ways, said valve being automatically opened by ingress of steam of a predetermined pressure through the steam inlet, a spring to automatically close said valve upon the reduction of pressure of said steam, and means to regulate the tension oie said spring substantially as den scribed.

CHARLES A. NASH. Witnesses F. L. Toon, ALMA LANE. 

